De Smet supplied over 200 wet and 250 dry degumming units and is world leader in Fats and oil technology

De Smet Deodorising- world leader in fats and oil technology

Ice Condensing Sublimax

The Sublimax® patented is a new generation vertical Ice Condensing technology, optimised specifically for the deodorising process, achieving very low absolute pressures and drastically reducing the running cost of the plant in terms of energy consumption and polluted water flow. Special vacuum production units have been developed to reach lower pressures and operating costs, and at the same time, to reduce emissions by a more efficient condensation of the volatiles. The dry ice condensing system is becoming more and more the standard in new refining plants. In this system, the sparge steam is iced on surface condensers working alternately at extreme low temperatures around minus 30°C.

The remaining non-condensables are removed either by mechanical pumps or roots blowers in series with a liquid ring pump or by a vacuum steam ejector system (booster). The dry ice condensation system reduces the motive steam consumption but requires extra electrical energy.

Feedstock Change Deodorisers

The Multistock® is a single shell compact column containing several integrated trays or compartments.In the upper part of the Multistock® the oil is heated to deodorising temperature and then cooled in the lower part of the Multistock®

Thermosyphon heat exchange This is accomplished with the thermosyphon heat recovery system in which the hot oil after deodorization is used to generate steam, which is condensed in the top tray to heat the incoming bleached oil.In the second tray the oil is heated to deodorization temperature with high pressure steam.

In the deodorizing trays the oil remains as a batch in the tray and movement must be induced.This is done by introducing the stripping steam into the tray in a number of gas-lift pumps.

Multi Stock deodorisers

The Multistock® is designed for the factory requiring maximum flexibility in processing different feedstocks daily. Product change is totally automated with the possibility of no production loss and minimum interstock contamination.

The Multistock® vessel mechanical design and process operating data covering normal operation, start-up and shut-down conditions have been submitted to rigorous finite element analysis for possible metal fatigue problems due to the thermal cycles (400.000 cycles over 20 years operation).

The highest stressed areas are strengthened and welding specifications guarantee a long working life.